package org.example;
public class Main {
    public static void main(String[] args) {
        Landder lander = new Landder();
        lander.above = 5.0f;
        lander.bottom = 10.0f;
        lander.setHeight(8.0f);
        float area = lander.computerArea();
        System.out.println("计算的面积是：" + area);
    }
}
